Organic light emitting display apparatus

ABSTRACT

An organic light emitting display apparatus that includes a substrate, an organic light emitting unit formed on the substrate, a reflection member disposed on a non-light emitting region of the organic light emitting unit, and a sealing member that seals the organic light emitting unit. The organic light emitting display apparatus can function as a display apparatus or a mirror.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No.2008-24906, filed Mar. 18, 2008 in the Korean Intellectual PropertyOffice, the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

Aspects of the present invention relate to an organic light emittingdisplay apparatus, and more particularly, to an organic light emittingdisplay apparatus functioning both as a display apparatus and as amirror.

2. Description of the Related Art

Organic light emitting display apparatuses are emissive displayapparatuses that generate light by re-combination of electrons and holesin a light emitting layer when a voltage is applied to an organic filmthat includes an anode, a cathode, and an organic light emitting layerinterposed between the anode and the cathode. Organic light emittingdisplay apparatuses are expected to be the next generation of displayapparatuses because of their advantages such as light weight, lowthickness, wide viewing angle, short response time, and low powerconsumption as compared to cathode ray tubes or liquid crystal displays.

In an organic light emitting display apparatus, an organic lightemitting device is disposed in a display region. The organic lightemitting display apparatus includes a pixel electrode and a facingelectrode facing each other, and a light emitting layer interposedbetween the pixel electrode and the facing electrode. Since the organiclight emitting display apparatus is easily damaged by foreign materialssuch as moisture or oxygen penetrating from the outside, the organiclight emitting display apparatus is sealed so that penetration offoreign materials from the outside can be prevented.

SUMMARY OF THE INVENTION

To address the above and/or other problems, aspects of the presentinvention provide an organic light emitting display apparatus that canalso function as a mirror where an organic light emitting device of theorganic light emitting display apparatus does not generate light.

One aspect of the present invention provides an organic light emittingdisplay apparatus comprising: a substrate; an organic light emittingunit formed on the substrate; a reflection member disposed on anon-light emitting region of the organic light emitting unit; and asealing member that seals the organic light emitting unit. The sealingmember may be separately disposed from the organic light emitting unit.

The organic light emitting display apparatus may further comprise acombining member that combines the substrate and the sealing member. Thecombining member may be disposed along edges of the substrate. Thecombining member may comprise spacers and a sealant.

The reflection member may be formed on a surface of the sealing memberthat faces the organic light emitting unit to correspond to thenon-light emitting region of the organic light emitting unit. Theorganic light emitting display apparatus may further comprise an opticalabsorption layer on a surface of the reflection member facing theorganic light emitting unit. The reflection member may be formed of amaterial that reflects light proceeding towards the reflection memberfrom outside of the organic light emitting display apparatus. Thereflection member may be formed of a metal that reflects lightproceeding towards the reflection member from outside of the organiclight emitting display apparatus. The reflection member may be formed ofAl. The reflection member may have a thickness of 250 Å or more.

Another aspect of the present invention provides an organic lightemitting display apparatus comprising: a substrate; a pixel electrodeformed on the substrate; a pixel defining layer that is formed on thepixel electrode and exposes a portion of the pixel electrode; anintermediate layer having a light emitting layer formed on the exposedpixel electrode; a facing electrode formed on the pixel defining layerand the intermediate layer; and a reflection member formed on the facingelectrode to correspond to the pixel defining layer.

The reflection member may be formed of a material that reflects lightproceeding towards the reflection member from outside of the organiclight emitting display apparatus. The reflection member may be formed ofa metal that reflects light proceeding towards the reflection memberfrom outside of the organic light emitting display apparatus. Thereflection member may be formed of Al. The reflection member may have athickness of 250 Å or more. The pixel electrode may be a reflectiveelectrode and the facing electrode may be a transparent electrode.

A third aspect of the present invention provides an organic lightemitting display apparatus comprising: a substrate; a pixel electrodeformed on the substrate; a pixel defining layer that is formed on thepixel electrode and exposes a portion of the pixel electrode; anintermediate layer having a light emitting layer formed on the exposedpixel electrode; a reflection member formed on the facing electrode tocorrespond to the pixel defining layer; and a facing electrode formed tocover the intermediate layer and the reflection member.

The reflection member may be formed of a material that reflects lightproceeding towards the reflection member from outside of the organiclight emitting display apparatus. The reflection member may be formed ofa metal that reflects light proceeding towards the reflection memberfrom outside of the organic light emitting display apparatus. Thereflection member may be formed of Al. The reflection member may have athickness of 250 Å or more. The pixel electrode may be a reflectiveelectrode and the facing electrode may be a transparent electrode. Anorganic light emitting display apparatus having the above structure canfunction both as a display apparatus and a mirror.

Additional aspects and/or advantages of the invention will be set forthin part in the description which follows and, in part, will be obviousfrom the description, or may be learned by practice of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects and advantages of the invention will becomeapparent and more readily appreciated from the following description ofthe embodiments, taken in conjunction with the accompanying drawings ofwhich:

FIG. 1 is a schematic cross-sectional view of an organic light emittingdisplay apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged cross-sectional view of portion A of FIG. 1;

FIG. 3 is a schematic cross-sectional view of an organic light emittingdisplay apparatus according to a second embodiment of the presentinvention; and

FIG. 4 is a schematic cross-sectional view of an organic light emittingdisplay apparatus according to a third embodiment of the presentinvention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail to the present embodiments of thepresent invention, examples of which are illustrated in the accompanyingdrawings, wherein like reference numerals refer to the like elementsthroughout. The embodiments are described below in order to explain thepresent invention by referring to the figures. Moreover, it is to beunderstood that where it is stated herein that one layer is “formed on”or “disposed on” a second layer, or interposed between two layers, thefirst layer may be formed or disposed directly on the other layers orthere may be intervening layers between the first layer and the otherlayers. Further, as used herein, the term “formed on” is used with thesame meaning as “located on” or “disposed on” or “interposed” and is notmeant to be limiting regarding any particular fabrication process.

FIG. 1 is a schematic cross-sectional view of an organic light emittingdisplay apparatus 100 according to an embodiment of the presentinvention. FIG. 2 is an enlarged cross-sectional view of portion A ofFIG. 1. Referring to FIGS. 1 and 2, the organic light emitting displayapparatus 100 includes a substrate 101, an organic light emitting unit110, a reflection member 103, a light absorption layer 104, and acombining member 107.

The substrate 101 can be formed of a material such as transparent glass,a plastic sheet, or silicon, and may be transparent as well as flexibleor rigid. The substrate 101 is not limited to the above materials, andcan be also formed of a metal plate.

The organic light emitting unit 110 is formed on the substrate 101. Inthe case of an active matrix organic light emitting display apparatus,the organic light emitting unit 110 can include one or more organiclight emitting devices 130 and thin film transistors 120. The organiclight emitting devices 130 and the thin film transistors 120 will now bedescribed. As depicted in FIG. 2, the organic light emitting unit 110includes a light emitting region B where the organic light emittingdevice 130 is formed and a non-light emitting region C where the organiclight emitting device 130 is not formed. The reflection member 103 canbe disposed in the non-light emitting region C, which will be describedlater. This embodiment is not limited to an active matrix organic lightemitting display apparatus but can also be applied to a passive matrixorganic light emitting display apparatus.

A sealing member 102 is disposed on an upper side of the organic lightemitting unit 110 and is joined to the substrate 101. That is, asdepicted in FIG. 1, the sealing member 102 can be disposed separatelyfrom the organic light emitting unit 110, and can be joined to thesubstrate 101 via the combining member 107. The sealing member 102 canbe glass or a plastic, for example, an acrylic. In the case of a topemission type organic light emitting display apparatus, the sealingmember 102 can be formed of an electrical insulating material havinghigh transparency with respect to light generated from the organic lightemitting unit 110. The electrical insulating material can be atransparent glass such as alkali glass or non-alkali glass; atransparent polymer such as polyethylene terephthalate, polycarbonate,polyether sulfone, polyvinyl fluoride (PVF) or an acrylic; a transparentceramic such as zirconia; or quartz.

The reflection member 103 can be disposed in the non-light emittingregion C of the organic light emitting unit 110. In particular, in theorganic light emitting display apparatus 100 depicted in FIG. 1, thereflection member 103 can be formed on a surface of the sealing member102 facing the organic light emitting unit 110 so that the reflectionmember 103 can correspond to the non-light emitting region C of theorganic light emitting unit 110. More specifically, as depicted in FIG.2, the reflection member 103 can be formed on the surface of the sealingmember 102 that faces the organic light emitting unit 110 so that thereflection member 103 can correspond to a pixel defining layer 112, bothof which are positioned in the non-light emitting region C. Thereflection member 103 can reflect light proceeding towards the organiclight emitting unit 110 from outside of the organic light emittingdisplay apparatus 100. Thus, when the organic light emitting unit 110does not emit light, the reflection member 103 can function as a mirrorby reflecting light proceeding towards the organic light emitting unit110 from outside of the organic light emitting display apparatus 100.

Also, since the reflection member 103 is disposed in the non-lightemitting region C of the organic light emitting unit 110, and not in thelight emitting region B, an optical path through which light emittedfrom the light emitting region B can be emitted to the outside of theorganic light emitting display apparatus 100 can be ensured. In the caseof a top emission type organic light emitting display apparatus 100,since the reflection member 103 is disposed in the non-light emittingregion C, the light emission surface can function not only as a displayunit but also as a mirror. In the case of a bottom emission type organiclight emitting display apparatus, the light emission area D can functionas a display unit and the non-emission surface can function as a mirror.

The reflection member 103 is formed of a material that can reflect lightproceeding towards the reflection member 103 from outside of the organiclight emitting display apparatus 100. For example, the reflection member103 can be formed of a metal selected from the group consisting of Al,Cr, Ag, Fe, Pt and Hg. Preferably, Al may be used to form the reflectionmember 103. When Al is used, and the reflection member 103 has athickness greater than 250 Å, the reflectivity of visible light is 75 to90%. The light absorption layer 104 can be formed on a surface of thereflection member 103 that faces the organic light emitting unit 110.The light absorption layer 104 absorbs light emitted from the organiclight emitting unit 110 and passing through the reflection member 103.The light absorption layer 104 can be a black matrix. The lightabsorption layer 104 can be formed of a metal such as Cr or Mo havingrelatively low reflectivity, or can be formed of an opaque insulatingmaterial such as CrOx or MoOx.

The combining member 107 joins the substrate 101 with the sealing member102. The combining member 107 can be disposed on edges of the substrate101, and the organic light emitting unit 110 is therefore surrounded bythe combining member 107. The combining member 107 can include a sealant105 and spacers 106. The spacers 106 are fully enclosed in the sealant105, and the spacers 106 can maintain a gap t between the substrate 101and the sealing member 102. The gap t between the substrate 101 and thesealing member 102 can be controlled by controlling the length of thespacers 106. Also, a mura effect such as a Newton ring phenomenon thatcan occur between the substrate 101 and the sealing member 102 can beprevented by controlling the length of the gap t of the spacers 106.

As cited above, FIG. 2 is an enlarged cross-sectional view of portion ofA of FIG. 1, that is, the specific configuration of the organic lightemitting unit 110. Referring to FIG. 2, at least one thin filmtransistor 120 is formed on the substrate 101 and at least one organiclight emitting device 130 is formed on a corresponding thin filmtransistor 120. The organic light emitting device 130 can include apixel electrode 111 electrically connected to the thin film transistor120, a facing electrode 114 disposed on the entire surface of thesubstrate 101, and an intermediate layer 113 that includes at least onelight emitting layer and is disposed between the pixel electrode 111 andthe facing electrode 114.

The thin film transistor 120 having a gate electrode 124, a sourceelectrode 126 a and a drain electrode 126 b, a semiconductor layer 122,a gate insulating film 123, and an interlayer insulating layer 125 isformed on the substrate 101. Also, the shape of the thin film transistor120 is not limited to the shape depicted in FIG. 2, and various thinfilm transistors such as an organic thin film transistor in which thesemiconductor layer 122 is formed of an organic material or a siliconthin film transistor in which the semiconductor layer 122 is formed ofsilicon can be used. If necessary, a buffer layer 121 formed of siliconoxide SiO₂, silicon nitride Si₃N₄, or silicon oxynitride SiO_(x)N_(y)can further be included between the thin film transistor 120 and thesubstrate 101. The buffer layer 121 improves the device characteristicsby preventing penetration of impurities generated from the substrate 101into the semiconductor layer 122.

The semiconductor layer 122 is formed on the buffer layer 121, and canbe an amorphous silicon film or a crystalline silicon film. Thesemiconductor layer 122 can include a source region 122 a, a drainregion 122 c, and a channel region 122 b.

The semiconductor layer 122 is enclosed by the gate insulating film 123.The gate electrode 124 that corresponds to the semiconductor layer 122and the interlayer insulating layer 125 that encloses the gate electrode124 are formed on an upper surface of the gate insulating film 123.

The source electrode 126 a and the drain electrode 126 b respectivelycontact the source region 122 a and the drain region 122 c throughcontact holes (not shown in the Figures) that are formed in the gateinsulating film 123 and the interlayer insulating layer 125.

The organic light emitting device 130 includes the pixel electrode 111and the facing electrode 114, that face each other, and the intermediatelayer 113 that is interposed between the pixel electrode 111 and thefacing electrode 114 and is formed of an organic material. Theintermediate layer 113 includes at least one light emitting layer, andcan include a plurality of layers, which will be described later.

The pixel electrode 111 functions as an anode electrode, and the facingelectrode 114 functions as a cathode electrode. Of course, the polarityof the pixel electrode 111 and the facing electrode 114 can be designedwith opposite polarity.

The pixel electrode 111 can be a transparent electrode or a reflectiveelectrode. If the pixel electrode 111 is a transparent electrode, thepixel electrode 111 can be formed of ITO, IZO, ZnO, or In₂O₃. If thepixel electrode 111 is a reflective electrode, the pixel electrode 111can include a reflective film formed of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd,Ir, Cr, or a combination or alloy of these metals and a film formed ofITO, IZO, ZnO, or In₂O₃ formed on the reflective film.

The facing electrode 114 can also be a transparent electrode or areflective electrode. If the facing electrode 114 is a transparentelectrode, the facing electrode 114 can include a film deposited to facethe intermediate layer 113 interposed between the pixel electrode 111and the facing electrode 114 using Li, Ca, LiF/Ca, LiF/Al, Al, Mg, or acombination of these materials and an auxiliary electrode or a buselectrode layer (not shown in the Figures) that is formed of a materialused to form the transparent electrode, such as ITO, IZO, ZnO, or In₂O₃,on the film. If the facing electrode 114 is a reflective electrode, thefacing electrode 114 can be formed by depositing Li, Ca, LiF/Ca, LiF/Al,Al, Mg, or a combination of these materials.

Meanwhile, the pixel defining layer 112 is formed on an outer side ofthe pixel electrode 111 in order to cover the edges of the pixelelectrode 111. Beside the function of defining a light emission region,the pixel defining layer 112, prevents the pixel electrode 111 and thefacing electrode 114 from electrically disconnecting from each other bypreventing the occurrence of an electric field concentration phenomenonat an edge portion of the pixel electrode 111 through widening the gapbetween the edge of the pixel electrode 111 and the facing electrode114.

Various intermediate layers 113 that include at least a light emittinglayer can be included between the pixel electrode 111 and the facingelectrode 114. The intermediate layer 113 can be formed of a smallmolecule organic material or a polymer organic material.

If the intermediate layer 113 is formed of a small molecule organicmaterial, the intermediate layer can be formed in a single or acomposite structure by stacking a hole injection layer (HIL), a holetransport layer (HTL), an emission layer (EML), an electron transportlayer (ETL), and an electron injection layer (El L) (the individuallayers are not separately shown in the Figures). An organic materialthat can be used to form the intermediate layer 113 includes copperphthalocyanine (CuPc), N,N′-Di(naphthalene-1-yl)-N,N′-diphenyl-benzidine(α-NPB), and tris-8-hydroxyquinoline aluminum (Alq3). The small moleculeorganic material layers can be formed by a vacuum evaporation methodusing masks.

If the intermediate layer 113 is formed of a polymer organic material,the intermediate layer 113 can have a structure in which an HTL and anEML are included. The polymer HTL can be formed ofpoly-(2,4)-ethylene-dihydroxy thiophene (PEDOT) and the light emittinglayer can be formed of poly-phenylenevinylene (PPV) or polyfluorene.

The organic light emitting device 130 is electrically connected to thethin film transistor 120 formed thereunder. In this case, if aplanarizing film 127 covering the thin film transistor 120 is formed,the organic light emitting device 130 is disposed on the planarizingfilm 127, and the pixel electrode 111 of the organic light emittingdevice 130 is electrically connected to the thin film transistor 120through a contact hole (not shown in the Figures) that is formed in theplanarizing film 127.

FIG. 3 is a schematic cross-sectional view of an organic light emittingdisplay apparatus 200 according to a second embodiment of the presentinvention. The organic light emitting display apparatus 200 of FIG. 3 isdifferent from the organic light emitting display apparatus 100 of FIGS.1 and 2 in that a reflection member 203 is positioned at a differentlocation from the reflection member 103. That is, a substrate 201, anorganic light emitting unit 210, a thin film transistor 220, a bufferlayer 221, a semiconductor layer 222, a source region 222 a, a drainregion 222 c, a channel region 222 b, a gate electrode 224, a sourceelectrode 226 a, a drain electrode 226 b, a gate insulating film 223, aninterlayer insulating layer 225, a planarizing film 227, a pixeldefining layer 212, an organic light emitting device 230, a pixelelectrode 211, a intermediate layer 213, a facing electrode 214, and asealing member 202 in the organic light emitting display apparatus 200of FIG. 3 all are respectively identical to the substrate 101, the thinfilm transistor 120, the buffer layer 121, the semiconductor layer 122,the source region 122 a, the drain region 122 c, the channel region 122b, the gate electrode 124, the source electrode 126 a, the drainelectrode 126 b, the gate insulating film 123, the interlayer insulatinglayer 125, the planarizing film 127, the pixel defining layer 112, theorganic light emitting device 130, the pixel electrode 111, theintermediate layer 113, the facing electrode 114, and the sealing member102 in the organic light emitting display apparatus 100 of FIG. 2, andthus, the descriptions thereof will not be repeated.

Referring to FIG. 3, the reflection member 203 is disposed in anon-light emitting region C of the organic light emitting unit 210. Morespecifically, the reflection member 203 can be formed on the facingelectrode 214 to correspond to the pixel defining layer 212. Thereflection member 203 of the organic light emitting display apparatus200 and the reflection member 103 of the organic light emitting displayapparatus 100 are both positioned in the non-light emitting region C.However, the reflection member 203 of the organic light emitting displayapparatus 200 is not disposed on the sealing member 202 but on thefacing electrode 214 formed on the pixel defining layer 212. In the caseof the top emission type organic light emitting display apparatus 200,light generated from the organic light emitting device 230 is emitted tothe outside through the sealing member 202. However, since thereflection member 203 is disposed on the facing electrode 214 formed onthe pixel defining layer 212 which is not formed in a light emittingpath, the optical extraction rate can be increased.

The reflection member 203 can be formed of a material that can reflectlight proceeding towards the reflection member 203 from outside of theorganic light emitting display apparatus 200, and in particular, can beformed of a metal that can reflect light. For example, the reflectionmember 203 can be formed of Al, Cr, Ag, Fe, Pt or Hg. Preferably, themetal can be Al. If Al is used, the reflection member 203 has athickness of 250 Å or greater, and the reflected percentage of visiblelight is 75 to 90%.

Since the reflection member 203 is formed of a material that can reflectlight proceeding towards the reflection member 203 from outside of theorganic light emitting display apparatus 200, when the organic lightemitting device 230 does not emit light, the reflection member 203 canperform as a mirror by reflecting light entering from the outside. Inthe organic light emitting display apparatus 200 having the aboveconfiguration, a single light emission face can simultaneously performas a display and as a mirror.

FIG. 4 is a schematic cross-sectional view of an organic light emittingdisplay apparatus 300 according to another embodiment of the presentinvention. The organic light emitting display apparatus 300 of FIG. 4 isdifferent from the organic light emitting display apparatus 100 of FIGS.1 and 2 in that a reflection member 303 is positioned at a differentlocation from the reflection member 103. That is, a substrate 301, anorganic light emitting unit 310, a thin film transistor 320, a bufferlayer 321, a semiconductor layer 322, a source region 322 a, a drainregion 322 c, a channel region 322 b, a gate electrode 324, a sourceelectrode 326 a, a drain electrode 326 b, a gate insulating film 323, aninterlayer insulating layer 325, a planarizing film 327, a pixeldefining layer 312, an organic light emitting device 330, a pixelelectrode 311, a intermediate layer 313, a facing electrode 314, and asealing member 302 in the organic light emitting display apparatus 300of FIG. 4 all are respectively identical to the substrate 101, the thinfilm transistor 120, the buffer layer 121, the semiconductor layer 122,the source region 122 a, the drain region 122 c, the channel region 122b, the gate electrode 124, the source electrode 126 a, the drainelectrode 126 b, the gate insulating film 123, the interlayer insulatinglayer 125, the planarizing film 127, the pixel defining layer 112, theorganic light emitting device 130, the pixel electrode 111, theintermediate layer 113, the facing electrode 114, and the sealing member102 in the organic light emitting display apparatus 100 of FIG. 2, andthus, the descriptions thereof will not be repeated.

Referring to FIG. 4, the reflection member 303 is disposed on anon-light emitting region C. More specifically, the reflection member303 is disposed on the pixel defining layer 312, and the facingelectrode 314 can be formed to cover the intermediate layer 313 and thereflection member 303. In the case of the top emission type organiclight emitting display apparatus 300, since the facing electrode 314 isa transparent electrode, although the reflection member 303 is coveredby the facing electrode 314, light proceeding towards the reflectionmember 303 from the outside can be reflected. Thus, the organic lightemitting display apparatus 300 can function as a mirror where theorganic light emitting device 330 does not emit light. Since thereflection member 303 is not disposed on a light emitting path in theorganic light emitting device 330, the optical extraction rate of theorganic light emitting display apparatus 300 can be increased.

The reflection member 303 is formed of a material that can reflect lightproceeding towards the reflection member 303 from the outside of theorganic light emitting display apparatus 300, and in particular, can beformed of a metal that can reflect light. For example, the reflectionmember 303 can be formed of Al, Cr, Ag, Fe, Pt or Hg. Preferably thereflection member 303 can be formed of Al. As described above, if Al isused, the reflection member 303 has a thickness of 250 Å or greater, andthe reflected percentage of visible light is 75 to 90%.

Although a few embodiments of the present invention have been shown anddescribed, it would be appreciated by those skilled in the art thatchanges may be made in this embodiment without departing from theprinciples and spirit of the invention, the scope of which is defined inthe claims and their equivalents.

1. An organic light emitting display apparatus comprising: a substrate;an organic light emitting unit formed on the substrate; a reflectionmember disposed on a non-light emitting region of the organic lightemitting unit; and a sealing member that seals the organic lightemitting unit.
 2. The organic light emitting display apparatus of claim1, wherein the sealing member is separately disposed from the organiclight emitting unit.
 3. The organic light emitting display apparatus ofclaim 2, further comprising a combining member that joins the substrateand the sealing member.
 4. The organic light emitting display apparatusof claim 3, wherein the combining member is disposed along edges of thesubstrate.
 5. The organic light emitting display apparatus of claim 3,wherein the combining member further comprises spacers and a sealant. 6.The organic light emitting display apparatus of claim 1, wherein thereflection member is formed on a surface of the sealing member thatfaces the organic light emitting unit to correspond to the non-lightemitting region of the organic light emitting unit.
 7. The organic lightemitting display apparatus of claim 6, further comprising a lightabsorption layer on a surface of the reflection member facing theorganic light emitting unit.
 8. The organic light emitting displayapparatus of claim 1, wherein the reflection member is formed of amaterial that reflects light proceeding towards the reflection memberfrom outside of the organic light emitting display apparatus.
 9. Theorganic light emitting display apparatus of claim 8, wherein thereflection member is formed of a metal that reflects light proceedingtowards the reflection member from outside of the organic light emittingdisplay apparatus. 10 The organic light emitting display apparatus ofclaim 1, wherein the reflection member is formed of Al.
 11. The organiclight emitting display apparatus of claim 10, wherein the reflectionmember has a thickness of 250 Å or more.
 12. An organic light emittingdisplay apparatus comprising: a substrate; a pixel electrode formed onthe substrate; a pixel defining layer that is formed on the pixelelectrode and exposes a portion of the pixel electrode; an intermediatelayer having a light emitting layer formed on the exposed pixelelectrode; a facing electrode formed on the pixel defining layer and theintermediate layer; and a reflection member formed on the facingelectrode to correspond to the pixel defining layer.
 13. The organiclight emitting display apparatus of claim 12, wherein the reflectionmember is formed of a material that reflects light proceeding towardsthe reflection member from outside of the organic light emitting displayapparatus.
 14. The organic light emitting display apparatus of claim 13,wherein the reflection member is formed of a metal that reflects lightproceeding towards the reflection member from outside of the organiclight emitting display apparatus.
 15. The organic light emitting displayapparatus of claim 14, wherein the reflection member is formed of Al.16. The organic light emitting display apparatus of claim 15, whereinthe reflection member has a thickness of 250 Å or more.
 17. The organiclight emitting display apparatus of claim 12, wherein the pixelelectrode is a reflective electrode and the facing electrode is atransparent electrode.
 18. An organic light emitting display apparatuscomprising: a substrate; a pixel electrode formed on the substrate; apixel defining layer that is formed on the pixel electrode and exposes aportion of the pixel electrode; an intermediate layer having a lightemitting layer formed on the exposed pixel electrode; a reflectionmember formed on the facing electrode to correspond to the pixeldefining layer; and a facing electrode formed to cover the intermediatelayer and the reflection member.
 19. The organic light emitting displayapparatus of claim 18, wherein the reflection member is formed of amaterial that reflects light proceeding towards the reflection memberfrom outside of the organic light emitting display apparatus.
 20. Theorganic light emitting display apparatus of claim 19, wherein thereflection member is formed of a metal that reflects light proceedingtowards the reflection member from outside of the organic light emittingdisplay apparatus.
 21. The organic light emitting display apparatus ofclaim 20, wherein the reflection member is formed of Al.
 22. The organiclight emitting display apparatus of claim 21, wherein the reflectionmember has a thickness of 250 Å or more.
 23. The organic light emittingdisplay apparatus of claim 18, wherein the pixel electrode is areflective electrode and the facing electrode is a transparentelectrode.
 24. The organic light emitting display apparatus of claim 12,further comprising: an absorption layer formed on each reflectionmember; an organic light emitting unit formed on the substrate; and asealing member that seals the organic light emitting unit, wherein: eachreflection member is formed on the surface of the sealing member facingthe substrate, and each absorption layer is disposed between thereflection member and the substrate.
 25. The organic light emittingdisplay apparatus of claim 12, wherein the reflection member is formedon the surface of the facing electrode facing the sealing member. 26.The organic light emitting display apparatus of claim 12, wherein thereflection member is formed between the facing electrode and the pixeldefining layer.
 27. The organic light emitting display apparatus ofclaim 12, wherein the reflection member is formed of a material thatreflects light proceeding towards the reflection member from outside ofthe organic light emitting display apparatus.
 28. The organic lightemitting display apparatus of claim 27, wherein the reflection member isformed of a metal that reflects light proceeding towards the reflectionmember from outside of the organic light emitting display apparatus, andthe metal is selected from the group consisting of Al, Cr, Fe, Pt andHg.
 29. The organic light emitting display apparatus of claim 28,wherein the reflection member is formed of Al.
 30. The organic lightemitting display apparatus of claim 29, wherein the reflection memberhas a thickness of 250 Å or more and the reflected percentage of visiblelight is 75 to 90%.
 31. The organic light emitting display apparatus ofclaim 12, wherein the pixel electrode is a reflective electrode and thefacing electrode is a transparent electrode.
 32. The organic lightemitting display apparatus of claim 12, wherein the intermediate layeris selected from at least one of the group consisting of a holeinjection layer, a hole transport layer, an emission layer, an electrontransport layer, and an electron injection layer.
 33. The organic lightemitting display apparatus of claim 12, wherein the pixel electrode isan anode electrode and the facing electrode is a cathode electrode. 34.The organic light emitting display apparatus of claim 12, wherein thepixel electrode is a cathode electrode and the facing electrode is ananode electrode.
 35. The organic light emitting display apparatus ofclaim 12, wherein the apparatus has a display function and a mirrorfunction.